WO2022088327A1

WO2022088327A1 - Trap-type sludge in-situ treatment device and method

Info

Publication number: WO2022088327A1
Application number: PCT/CN2020/131050
Authority: WO
Inventors: 胡明明; 朱霖毅; 潘正国
Original assignee: 无锡德林海环保科技股份有限公司
Priority date: 2020-10-26
Filing date: 2020-11-24
Publication date: 2022-05-05
Also published as: CN113045173A

Abstract

The present invention relates to the technical field of environmental protection apparatuses, and in particular to a trap-type sludge in-situ treatment device and method. The trap-type sludge in-situ treatment device is characterized in that same comprises a trap pipe, a water retaining pipe and a heating device, wherein the trap pipe is configured to be placed in a lake bed or a riverbed, and a trap cavity used for storing sludge is formed inside the trap pipe; an upper end of the water retaining pipe is higher than the surface of the water, and a lower end of the water retaining pipe is abutted against an upper end of the trap pipe to prevent river water from entering the trap cavity; and the heating device is used for heating and drying the sludge in the trap cavity of the trap pipe. By means of the solution, the sludge is dried and dewatered in situ, such that secondary environmental pollution of cleared sludge is reduced. In addition, by means of the solution, the sludge can be concentrated in the trap pipe for water isolation treatment by using natural factors such as lake flow, and disturbance to benthic habitats is small, the influence range is small, and damage to ecology at the bottom of the water is small.

Description

A trap type sludge in-situ treatment device and method

technical field

The invention relates to the technical field of environmental protection equipment, in particular to a trap-type sludge in-situ processing device and method.

Background technique

With the continuous improvement of living standards and the gradual enhancement of people's awareness of environmental protection, people are very concerned about the surrounding living environment and the quality of living space. In the face of deteriorating environments, calls for improvement and governance are growing. Among them, the protection and pollution control of water environment are particularly prominent. Various water environments (including reservoirs, lakes, rivers, ditches, etc.) in the city and its surrounding areas are difficult to control, and many years of untreated water have deposited a large amount of silt on the bottom of the water, seriously affecting the water environment, making the water black and smelly, and disturbing residents. has happened. Water dredging is the whole process of cutting, collecting, pumping, and transporting silt from rivers and lakes from the bottom of the water to specific areas for centralized environmental protection treatment. The domestic garbage and construction waste in the urban silt accumulate into mountains, and the lake bottom contains a large amount of biogas, poisonous gas, odor and even heavy metals and other harmful pollutants. How to carry out environmental protection dredging and how to deal with the cleared sludge are issues that are being discussed by the international community today. If a certain link is not handled properly, the dredging project will bring serious and large-scale secondary pollution with unimaginable consequences.

The pollutants in the silt are mainly distributed in the floating mud and the flowing mud in the shallow 0-20 cm area of the bottom mud. It is black or grayish black, the geological deposition is relatively new, and the organic matter deposition rate is fast. It is the product of the impact of human activities (eutrophication or enclosure culture) on the water environment in recent decades. This part of the silt has bedding characteristics, and is easily lifted up by comprehensive dynamic factors such as wind waves and wind blowing currents, and gathers in the downwind direction under the action of wind boosting. The silt pollution layer can be resuspended in the water body when it is slightly stirred, and it is the main reservoir and release source of the source pollutants in the water body. The cleaning of bedding sludge can intuitively bring nutrients and heavy metals out of the polluted water body.

The existing sediment dredging technologies mainly include water conservancy scouring + pump suction, dredging + filling/shipping, stirring suction and other technologies. During the implementation of the above technologies, not only the sediment is agitated, but the nutrients in the sludge are accelerated to the water body. In addition, the cleared sludge needs to be dehydrated, stacked and landfilled, and it also occupies land resources, which is easy to cause secondary pollution. There are lakebed river water ecosystems. In view of the above drawbacks, it is proposed to excavate a certain number and depth of silt capture ditches when the bottom mud needs to be dredged out, and the floating mud and flowing mud driven by natural hydrodynamic force fall to the bottom of the ditches when they pass through the ditches. The degree of sediment disturbance during the silting process, but the silt still faces problems such as dehydration, stacking and landfill when it is filled and cleared. In view of the various shortcomings of the above technologies, it is necessary to improve the equipment used in the existing dredging technology. In order to achieve in-situ treatment and reduce secondary hazards during sludge disposal.

SUMMARY OF THE INVENTION

In order to solve the above problems, the first object of the present invention is to provide a trap-type sludge in-situ treatment device, which can dry and dehydrate the sludge in-situ, thereby reducing the secondary pollution of the cleared sludge to the environment. Moreover, this scheme can use natural factors such as lake current to concentrate the silt in the trap tube for water isolation treatment, which has little disturbance to the benthic habitat, small impact range, and little damage to the underwater ecology.

The second object of the present invention is to provide a trap-type sludge in-situ treatment method, which adopts the above-mentioned in-situ treatment device.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme:

A trap type sludge in-situ treatment device is characterized in that: it comprises a trap pipe, a water retaining pipe and a heating device;

The trap tube is used to be placed in a lake bed or a river bed, and the inside of the trap tube constitutes a trap cavity for storing silt;

The upper end of the water retaining pipe is higher than the water surface, and the lower end is butted with the upper end of the trap pipe to prevent river (lake) water from entering the trap cavity;

The heating device heats and dries the sludge in the trap cavity of the trap tube.

The present invention adopts the above technical solution, and the technical solution relates to a trap-type sludge in-situ treatment device, the sludge in-situ treatment device includes a trap pipe, a water retaining pipe and a heating device. Among them, the trap tube is used to be placed in the lake bed or the river bed, and the silt can flow into the trap cavity through the action of artificial or water flow; in this way, the trap tube separates the silt in the trap cavity from the silt outside the tube. The water retaining pipe can prevent the river water from entering the trap cavity, that is, the river water in the pipe is separated from the river water outside the pipe; in this way, the river water inside the retaining pipe can be drained. The heating device heats and dries the sludge in the trap cavity of the trap tube, and the water vapor of the sludge is continuously evaporated and gradually dried.

Compared with the existing sludge cleaning, this scheme performs drying and dehydration treatment on the sludge in situ, which reduces the secondary pollution of the cleared sludge to the environment; and the scheme can use natural factors such as lake flow to concentrate the sludge in the environment. The internal water isolation treatment of the trap pipe has little disturbance to the benthic habitat, small impact range, and little damage to the underwater ecology.

Preferably, the heating device includes a heat conduction pipe capable of drilling into the ground to obtain geothermal energy, and a heat conduction component located inside the trap cavity of the trap tube and generating heat conduction between the heat conduction pipe and the heat conduction pipe. The technical solution further defines the specific structure of the heating device. The heating device drills into the ground through a heat-conducting pipe to obtain geothermal energy and conducts the geothermal energy, that is, uses the geothermal energy to dry the stored sludge without consuming energy. Moreover, compared with other heating methods, this solution also reduces pollution and potential safety hazards, and is not limited by conditions.

Preferably, the heat-conducting component is disposed on the inner sidewall of the trap tube or formed inside the trap tube, and the heat-conducting tube and the heat-conducting component communicate with each other to achieve heat conduction. Based on the principle of using geothermal energy to dry the stored sludge in the above technical solution, this solution further defines that the heat-conducting component is arranged around the inner side wall of the trap tube or formed inside the trap tube, and the heat-conducting tube transfers heat to the heat-conducting component. When it is installed, the heat-conducting component can heat and dry the sludge from the outside to the inside by enclosing the internal mud. The surrounding mud is closer to the heat-conducting component and is easier to be heated and dried; the internal mud is subjected to heat conduction in multiple directions around the circumference. Therefore, it is also relatively easy to dry, so as to ensure that the sludge in each area is heated evenly.

Preferably, a heat-conducting cavity is provided in the heat-conducting component, or a heat-conducting cavity is formed between the heat-conducting component and the trap tube; and a heat-conducting fluid medium that communicates with each other is provided in the heat-conducting tube and the heat-conducting cavity in the heat-conducting component. In this technical solution, after the heat transfer pipe obtains the geothermal heat, the heat is transferred to the heat transfer cavity in the heat transfer component through the heat transfer fluid medium, and the heat transfer efficiency is higher.

Preferably, the trap tube includes a bottom plate and a side wall arranged around the edge of the bottom plate; a trap cavity is formed between the side wall and the bottom plate, and the heat pipe passes through the bottom plate of the trap tube. As described in the above technical solution, the trap tube separates the sludge in the trap cavity from the sludge outside the tube, so the trap tube is required to be enclosed by a side wall, but not a bottom plate. In another embodiment, the trap tube may not be provided with a bottom plate; however, in this solution, a bottom plate is provided at the bottom of the trap tube, which can improve drying efficiency and reduce drying time.

Preferably, the heat-conducting component is an inner tube body disposed inside the trap tube; a heat-conducting cavity is formed between the inner tube body and the trap tube; the heat-conducting tube at least includes a lower tube section below the trap tube, and a tube above the trap tube. The upper pipe section; the upper end of the lower pipe section is connected with the bottom plate of the trap tube, the upper end of the upper pipe section is higher than the water surface, and the lower end communicates with the inner pipe body or the trap pipe; the upper pipe section, the lower pipe section and the heat conduction cavity are connected with each other . Based on the solution described in the above solution that the heat conduction pipe transfers heat to the heat conduction component through the heat conduction fluid medium, the solution further defines the connection structure of the heat conduction component, the trap tube and the heat conduction tube. Specifically, the heat-conducting component in this solution is an inner tube body, the inner tube body and the trap tube form an inner and outer tube, and a heat-conducting cavity is formed inside, similar to a heat-conducting sandwich; and the heat-conducting cavity is provided with two openings, One opening communicates with the lower pipe section, and the other opening communicates with the upper pipe section, so that the heat transfer cavity, the lower pipe section and the upper pipe section are all connected, and the heat transfer fluid medium can circulate between the heat transfer cavity, the lower pipe section and the upper pipe section. When the bottom end is inserted into the ground to heat the heat-conducting fluid medium in the heat-conducting pipe under the action of geothermal heat, the specific gravity of the bottom medium is lighter than that of the upper medium after heating, and the up-and-down convection is formed. Sludge heating.

Preferably, it also includes several mud guiding grooves radially arranged relative to the trap tube, the depth of the proximal end of the mud guiding groove is greater than that of the distal end, and the proximal end points to the trap cavity. The technical solution also provides a mud guide groove. Through the setting of the mud guide groove, the sludge far from the trap type sludge in-situ treatment device flows into the mud guide groove under the action of the lake flow, and then enters the trap pipe from the mud guide groove to realize the sludge removal. Natural collection.

Preferably, the lower end of the water blocking pipe is sleeved on the outer end of the trap pipe. The solution that the water retaining pipe is directly placed on the upper end of the trap pipe needs to be sealed at the joint, but the water retaining pipe in this solution is slightly larger than the trap pipe. The sealing effect can be achieved if the water retaining pipe is placed outside the trap pipe and directly inserted into the lake bed. Also sealed.

A trap type sludge in-situ treatment method is characterized in that: comprises the following steps:

S1: The trap tube is placed in the lake bed or river bed, and the silt flows into the trap tube naturally or artificially until it is full and no longer settles;

S2: Cover the trap tube with the water retaining tube, and drain the water on the trap tube;

S3: The silt in the trap tube is heated by a heating device. At the same time, the silt naturally undergoes anaerobic digestion and generates heat. Under the superposition of natural subsidence, geothermal and biochemical heat, the silt water vapor continuously evaporates, gradually dries and continues to settle and reduce volume , until the moisture content is lower than the preset standard;

S4: Cover the silt in the trap pipe with water-proof material, and pull out the water-blocking pipe;

S5: Repeat steps S1-S4 until the trap is filled with sludge with a moisture content lower than the preset standard, and then execute S6;

S6: Start from the part with the lowest moisture content of the mud at the bottom of the trap pipe, remove the mud in the trap pipe with a pump or an appropriate method, and pull out the water retaining pipe.

Preferably, the step S1 includes arranging a mud guide groove or digging a mud guide groove along the radial direction of the trap pipe; due to the fluidity of the mud, the mud close to the trap mouth of the trap type mud in-situ treatment device directly under the action of the lake flow The sludge that flows into the trap pipe and is far away from the trap-type sludge in-situ treatment device flows into the mud guide tank under the action of the lake flow, and then enters the trap pipe from the mud guide groove to realize the natural collection of sludge.

Preferably, the heating device includes a heat transfer pipe that can be drilled into the ground to obtain geothermal energy, and a heat transfer component that is located inside the trap cavity of the trap tube and generates heat conduction with the heat transfer pipe. The heat transfer pipe and the heat transfer cavity in the heat transfer component are provided with The heat-conducting fluid medium that conducts with each other; Step S3 is specifically: injecting the heat-conducting fluid medium into the heat-conducting pipe, the heat-conducting fluid medium inside the heat-conducting pipe absorbs the underground heat, and flows to the upper part of the heat-conducting pipe and the heat-conducting components, and the sludge in the trap pipe is cleaned. heating.

To sum up, the beneficial effects of the present invention compared with the prior art are:

Through the trap-type sludge in-situ treatment device and method shown in the present invention, natural factors such as lake flow can be used to collect sludge. Compared with the existing sludge cleaning, energy consumption is not required, and the benthic habitat is disturbed during the sludge collection process. Small, small impact range, small damage to the underwater ecology.

With the trap-type sludge in-situ treatment device and method shown in the present invention, the stored sludge is dried by using geothermal energy without consuming additional energy.

Through the trap type sludge in-situ treatment device and method shown in the present invention, the sludge is dried by using geothermal heat, without adding flocculation and other chemicals, and avoiding the unusable sludge after chemical chemicals are used.

Finally, the trap-type sludge in-situ treatment device and method shown in this application realizes the continuous treatment of the flow dynamic sludge with the most serious bottom pollution, which is beneficial to the endogenous treatment of eutrophic water bodies.

Description of drawings

FIG. 1 is a cross-sectional view of the trap-type sludge in-situ treatment device shown in Example 1. FIG.

FIG. 2 is a plan view of the trap-type sludge in-situ treatment device in Example 1. FIG.

FIG. 3 is a process flow diagram of the trap-type sludge in-situ treatment method in Example 2. FIG.

In the figure, 1. Water retaining pipe; 2. Trap pipe; 3. Heat conduction pipe; 4. Heat-conducting fluid medium; 5. Sludge; ; 11, heat-conducting components; 12, heat-conducting cavity; 31, lower pipe section; 32, upper pipe section.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise", etc. The orientation or positional relationship shown in the figures is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present invention. Invention limitations.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise expressly defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Example 1:

As shown in Figures 1 and 2, this embodiment relates to a trap-type sludge in-situ treatment device, including a trap pipe 2, a water retaining pipe 1 and a heating device. The specific structures of the trap pipe 2, the water blocking pipe 1 and the heating device are as follows:

The trap tube 2 is used to be placed in the lake bed 7 or the river bed, and the trap tube 2 forms a trap cavity for storing sludge inside. Specifically, the trap tube 2 includes a bottom plate and a side wall arranged around the edge of the bottom plate, and a trap cavity is formed between the side wall and the bottom plate. The trap tube 2 in this scheme is used to be placed in the lake bed 7 or the river bed, and the sludge 5 can flow into the trap cavity through the action of artificial or water flow. The trap tube 2 needs to separate the sludge in the trap cavity from the sludge outside the tube. For the trap tube 2, the enclosed side wall is necessary, but the bottom plate is not necessary. In another embodiment, the trap tube 2 may not be provided with a bottom plate. In contrast, in this solution, a bottom plate is provided at the bottom of the trap tube 2, which can improve the drying efficiency and reduce the drying time. In actual use, the diameter of the trap tube is greater than 10cm, the upper end is flush with the lake bed, and the depth of the lower end is not more than 100 meters.

The upper end of the water retaining pipe 1 is higher than the water surface 8, and the lower end is butted with the upper end of the trap pipe 2 to prevent the river water from entering the trap cavity; even if the river water in the pipe is separated from the river water outside the pipe. In a further embodiment, the lower end of the water blocking pipe 1 is sleeved on the outer end of the trap pipe 2 . The solution in which the water blocking pipe 1 is directly placed on the upper end of the trap pipe 2 is to seal the connection, and the water blocking pipe 1 in this scheme is slightly larger than the trap pipe 2. It can be inserted outside the trap pipe 2 and directly inserted into the lake bed 7 To achieve the sealing effect, no additional sealing is required.

The heating device heats and dries the sludge in the trap cavity of the trap tube 2 . In use, generally after draining the water in the water retaining pipe 1, the heating device is used to heat the sludge in the trap cavity of the trap pipe 2, so that the sludge water vapor 10 is continuously evaporated and gradually dried. The above-mentioned heating device can be any device that can be inserted into the trap cavity of the trap tube 2 to heat the sludge; for example, it can be an electric heating tube, which extends into the trap cavity of the trap tube 2 from the top of the water retaining tube 1 .

In a more preferred solution described in this embodiment, the heating device includes a heat transfer pipe 3 that can be drilled into the ground to obtain geothermal energy, and a heat transfer pipe 3 that is located inside the trap cavity of the trap pipe 2 and generates heat conduction with the heat transfer pipe 3 Part 11, the heat transfer pipe 3 passes through the bottom plate of the trap pipe 2, the upper end of the heat transfer pipe 3 is higher than the lake bed, and the depth of the lower end exceeds 100 meters. The technical solution further defines the specific structure of the heating device. The heating device drills into the ground through the heat pipe 3 to obtain geothermal energy and conducts the geothermal energy, that is, the stored sludge is dried by using the geothermal energy without consuming additional energy. . Moreover, compared with other heating methods, this solution also reduces pollution and potential safety hazards, and is not limited by conditions. In a further embodiment, the heat-conducting component 11 is disposed on the inner side wall of the trap tube 2 or formed inside the trap tube 2 , and the heat-conducting tube 3 communicates with the heat-conducting component 11 to achieve heat conduction. The above technical solution describes the principle of using geothermal energy to dry the stored sludge. This solution further defines that the heat-conducting member 11 is arranged around the inner wall of the trap tube 2 or is formed inside the trap tube 2, and the heat-transfer tube 3 dissipates heat 9 When transferred to the heat-conducting component 11, the heat-conducting component 11 can heat and dry the sludge from the outside to the inside by enclosing the internal mud. The internal sludge is thermally conducted in multiple directions in the circumferential direction, so it is relatively easy to dry, so as to ensure that the sludge in each area is heated evenly.

Based on the above solution, in this solution, the thermally conductive component 11 is provided with a thermally conductive cavity or a thermally conductive cavity 12 is formed between the thermally conductive component 11 and the trap tube 2 . The heat-conducting fluid medium 4 in the heat-conducting pipe 3 and the heat-conducting cavity 12 in the heat-conducting component 11 is provided with the heat-conducting fluid medium 4, and the heat-conducting fluid medium 4 here is generally water. After the heat transfer pipe 3 obtains the geothermal heat, the heat 9 is transferred to the heat transfer cavity 12 in the heat transfer component 11 through the heat transfer fluid medium 4, and the heat conduction efficiency is higher. The connection structure of the heat conduction component 11 , the trap tube 2 and the heat conduction tube 3 is as follows: the heat conduction component 11 is an inner tube body disposed inside the trap tube 2 , and a heat conduction cavity 12 is formed between the inner tube body and the trap tube 2 . The heat transfer pipe 3 at least includes a lower pipe section 31 located below the trap pipe 2 and an upper pipe section 32 located above the trap pipe 2 . The upper end of the lower pipe section 31 is connected to the bottom plate of the trap tube 2. Since the lower pipe section 31 needs to obtain geothermal energy and may need to be drilled into the ground several hundred meters, the lower pipe section 31 can be formed by splicing multiple pipe bodies. The upper end of the upper pipe section 32 is higher than the water surface 8 , and the lower end communicates with the inner pipe body or trap pipe 2 . The upper pipe section 32 , the lower pipe section 31 and the heat conduction cavity 12 are connected to each other. On the basis of the above solution that the heat transfer pipe 3 transfers the heat 9 to the heat transfer member 11 through the heat transfer fluid medium 4, the heat transfer member 11 in this scheme is an inner tube body, and the inner tube body and the trap tube 2 form an inner and outer tube. In the form of a heat conducting cavity 12, it is similar to a heat conducting interlayer. The heat-conducting cavity 12 is provided with two openings, one opening communicates with the lower pipe section 31 and the other opening communicates with the upper pipe section 32, so that the heat-conducting cavity 12, the lower pipe section 31 and the upper pipe section 32 are all communicated, and the heat-conducting fluid medium 4 can be The heat transfer cavity 12 , the lower pipe section 31 and the upper pipe section 32 communicate with each other. When the bottom end is inserted into the ground, the heat-conducting fluid medium 4 in the heat-conducting pipe 3 is heated under the action of geothermal heat. When the temperature of the bottom medium heats up, the specific gravity is lighter than that of the upper medium to form up and down convection, and the heat-conducting fluid medium 4 flows into the heat-conducting cavity 12 through the heat-conducting pipe 3. , the sludge in the trap tube 2 is heated by the heat conducting member 11 .

Finally, the above-mentioned trap-type sludge in-situ treatment device further includes a plurality of mud guiding grooves 6 radially arranged relative to the trap pipe 2 . In this technical solution, a mud guiding groove 6 is also provided. Through the setting of the mud guiding groove 6, the sludge far from the trap type sludge in-situ treatment device flows into the mud guiding groove 6 under the action of the lake flow, and then enters the trap pipe from the mud guiding groove 6. 2, to realize the natural collection of silt. The mud guiding tank 6 in this scheme is used as a trap-type sludge in-situ treatment device, which is a kind of groove member and is an integral part of the device. Of course, the mud guiding groove 6 can also be a trench temporarily excavated on the river bed. At this time, the mud guiding groove 6 is not a component of the trap-type sludge in-situ treatment device.

With the trap-type sludge in-situ treatment device and method shown in the present invention, the stored sludge is dried by using geothermal energy without consuming energy.

For the specific sludge treatment method of the trap-type sludge in-situ treatment device described in the above embodiment, refer to Embodiment 2.

Example 2:

As shown in FIG. 3, this embodiment describes a trap-type sludge in-situ treatment method, which adopts the trap-type sludge in-situ treatment device in the above-mentioned embodiment 1, and specifically includes the following steps:

S1: Put the trap tube 2 into the lake bed 7 or the river bed, and the silt flows into the trap tube 2 naturally or artificially until it is full and no longer settles. Specifically, in this step, the mud guiding groove 6 is also arranged or the mud guiding groove 6 is arranged radially along the trap pipe 2; due to the fluidity of the mud, the mud near the trap mouth of the trap type mud in-situ treatment device has the effect of the lake current. The sludge flows directly into the trap pipe 2, and the sludge far from the trap type sludge in-situ treatment device flows into the mud guide tank 6 under the action of the lake flow, and then enters the trap pipe 2 from the mud guide tank 6 to realize the natural collection of sludge.

S2: Cover the trap tube 2 with the water blocking tube 1, and drain the water on the trap tube 2.

S3: Use a heating device to heat the sludge in the trap pipe 2, specifically injecting water into the heat transfer pipe 3, the water inside the heat transfer pipe 3 absorbs the underground heat 9 and flows to the upper part of the heat transfer pipe 3 and the heat transfer component 11. The sludge in the trap tube 2 is heated. At the same time, the silt naturally undergoes anaerobic digestion and generates heat 9. Under the superposition of natural subsidence, geothermal and biochemical heat, the silt water vapor 10 continuously evaporates, gradually dries and continues to settle and reduce volume until the water content is lower than the preset standard.

S4: Cover the mud in the trap tube 2 with a water-proof material, and pull out the water blocking tube 1.

S5: Repeat steps S1-S4 until the trap is filled with sludge with a moisture content lower than the preset standard, and then execute S6.

S6: Start from the part with the lowest mud moisture content at the bottom of the trap pipe, remove the entire pipe sludge in the trap pipe 2 with a pump or an appropriate method, and pull out the water blocking pipe 1.

The following is an explanation of the meaning of the block diagram in Figure 3, wherein

The collection represents the natural or artificial flow of silt into the trap pipe 2, that is, step S1;

Water blocking means that the water blocking pipe 1 covers the trap pipe 2 to prevent the river water from entering the trap cavity; that is, step S2;

Drying means that the heating device heats and dries the sludge in the trap tube 2, which is recorded in S3;

Digestion represents the organic matter in the anaerobic digestion sludge of the sludge entering the trap tube 2 under natural conditions, recorded in S3;

Sealing means covering the sludge in the trap tube 2 with a water-proof material, that is, S4;

Clearing means clearing the whole pipe sludge in the trap pipe 2, that is, step S6;

A small cycle refers to repeating steps S1-S4; a large cycle refers to repeating steps S1-S6.

Experimental record:

The applicant adopted the trap-type sludge in-situ treatment device described in Example 1 and a trap-type sludge in-situ treatment method described in Example 2, and obtained the following data through multiple experiments; The temperature in the trap tube 2 can reach more than 30°C at a depth of 700 meters; when the lower end of the heat transfer tube 3 is inserted into the ground at a depth of 700 meters, the temperature in the trap tube 2 can also increase by about 6°C. Although the depth at which the heat pipe is inserted into the ground is different in the two sets of data, the silt in the trap pipe 2 is dried until the water content can be lower than 75%. The 500-meter solution has higher drying efficiency and shorter time consumption. From its experiments, it can be seen that the energy obtained by the heat transfer pipe 3 is related to the drying degree of the sludge in the trap pipe 2; under the condition that the drying time is sufficient, the above-mentioned device and method can make the sludge dry. can be lower than 60%.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art will not depart from the principles and spirit of the present invention Variations, modifications, substitutions, and alterations to the above-described embodiments are possible within the scope of the present invention without departing from the scope of the present invention.

Claims

A trap-type sludge in-situ treatment device is characterized in that: it comprises a trap pipe (2), a water retaining pipe (1) and a heating device;

The trap tube (2) is used to be placed in a lake bed (7) or a river bed, and the trap tube (2) forms a trap cavity for storing the silt (5) inside;

The upper end of the water retaining pipe (1) is higher than the water surface (8), and the lower end is butted with the upper end of the trap pipe (2) to prevent river (lake) water from entering the trap cavity;

The heating device is used for heating and drying the sludge in the trap cavity of the trap pipe (2).
A trap type sludge in-situ treatment device according to claim 1, characterized in that: the heating device comprises a heat conduction pipe (3) that can be drilled into the ground to obtain geothermal energy, and is located inside the trap cavity of the trap pipe (2). A heat conducting component (11) for heat conduction is generated between the heat conducting pipe (3).
A trap-type sludge in-situ treatment device according to claim 2, characterized in that: the heat-conducting component (11) is arranged on the inner side wall of the trap tube (2) or formed inside the trap tube (2), and the heat-conducting tube (2) (3) Conducting heat conduction with the heat conducting member (11).
A trap-type sludge in-situ treatment device according to claim 3, characterized in that: the heat-conducting component (11) is provided with a heat-conducting cavity (12) or a connection between the heat-conducting component (11) and the trap tube (2). A heat-conducting cavity (12) is formed between the heat-conducting pipes (3) and the heat-conducting cavity (12) in the heat-conducting component (11);
A trap-type sludge in-situ treatment device according to any one of claims 1 to 4, characterized in that: the trap pipe (2) comprises a bottom plate and a side wall arranged around the edge of the bottom plate; the side wall and A trap cavity is formed between the bottom plates, and the heat conduction pipe (3) passes through the bottom plate of the trap pipe (2).
A trap-type sludge in-situ treatment device according to claim 5, characterized in that: the heat-conducting component (11) is an inner pipe body disposed inside the trap pipe (2); the inner pipe body and the trap pipe (2) A heat-conducting cavity (12) is formed between ); the heat-conducting pipe (3) at least includes a lower pipe section (31) below the trap pipe (2), and an upper pipe section (32) above the trap pipe (2); the The upper end of the lower pipe section (31) is connected with the bottom plate of the trap pipe (2), the upper end of the upper pipe section (32) is higher than the water surface (8), and the lower end is communicated with the inner pipe body or the trap pipe (2); The pipe section (32), the lower pipe section (31) and the heat conduction cavity (12) are in communication with each other.
A trap type sludge in-situ treatment device according to claim 1, characterized in that it further comprises a plurality of mud guide grooves (6) radially arranged relative to the trap pipe (2), and the mud guide grooves (6) The proximal depth of the is greater than the distal depth and the proximal end points into the trap cavity.
A trap type sludge in-situ treatment method is characterized in that: comprises the following steps:

S1: Put the trap pipe (2) into the lake bed (7) or the river bed, and the silt (5) flows into the trap pipe (2) naturally or artificially until it is full and no longer settles;

S2: Cover the trap tube (2) with the water blocking tube (1), and drain the trap tube (2) covered with water;

S3: A heating device is used to heat the sludge in the trap tube (2). At the same time, the sludge naturally undergoes anaerobic digestion and generates heat (9). Under the superposition of natural settlement, heating and biochemical heat, the sludge vapor (10) is continuously Evaporate, gradually dry and continue to settle and reduce volume until the moisture content is lower than the preset standard;

S4: Cover the mud in the trap pipe (2) with a water-proof material, and pull out the water blocking pipe (1);

S5: Repeat steps S1-S4; until the trap is filled with sludge with a moisture content lower than the preset standard, perform S6;

S6: Remove the sludge in the whole trap pipe (2), and pull out the water blocking pipe (1).
A trap-type sludge in-situ treatment method according to claim 8, characterized in that: the step S1 comprises arranging a mud-guiding groove (6) or digging and arranging a mud-guiding groove (6) along the radial direction of the trap pipe (2). ); the sludge close to the trap mouth of the trap-type sludge in-situ treatment device flows directly into the trap pipe (2) under the action of the lake current, and the sludge far from the trap-type sludge in-situ treatment device flows into the mud guide tank under the action of the lake current. (6), and then enter the trap pipe (2) from the mud guide groove (6) to realize the natural collection of sludge.
A trap type sludge in-situ treatment method according to claim 8, characterized in that: the heating device in step S3 heats the sludge in the trap pipe (2), specifically means injecting the sludge into the heat transfer pipe (3). The heat-conducting fluid medium (4), the heat-conducting fluid medium (4) inside the heat-conducting pipe (3) absorbs the underground heat (9), and flows to the upper part of the heat-conducting pipe (3) and the heat-conducting component (11), to the trap pipe (2) The sludge inside is heated.